Study of droplet splashing on a liquid film with a tunable surface tension pseudopotential lattice Boltzmann method
Source abstract
Abstract
A tunable surface tension pseudopotential lattice Boltzmann method (LBM) with an axisymmetric boundary is applied to study a droplet splashing on a thin film. Our work focused on the crown behavior influenced by the different parameters, including the Reynolds number, Weber number, liquid film thickness, and gravity acceleration. In addition, the total kinetic energy of the crown is proposed to explain the evolution of the crown shape from the perspective of energy. Based on the achieved results, it is found that the crown radius changes with time are unaffected by these parameters and consistent with the power-law in previous studies. However, the height of the crown and the satellite droplet formation process are affected by the referred parameters. Besides, it is found that the energy consumption during the collapse process and splash angle are two key factors affecting the height of the crown. There is a threshold liquid film thickness with the maximum height of the crown, which is between 0.2 and 0.25 times the droplet radius. This study shows that the proposed LBM pseudopotential model is a robust and effective tool for the study of the droplet splashing on the thin film and has the potential to predict the droplet splashing phenomena in the presence of complex boundaries.
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Research context
OpenAlex topics: Lattice Boltzmann Simulation Studies · Fluid Dynamics and Heat Transfer · Aerosol Filtration and Electrostatic Precipitation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Southwest Research Institute for Water Transport Engineering, Chongqing Jiaotong University 1 , Chongqing 400074, China
State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University 2 , Chengdu 610065, China
CRCC Harbour and Channel Engineering Bureau Group Survey and Design Institute Co. Ltd. 3 , Guangzhou 511442, China
School of Shipping and Naval Architecture, Chongqing Jiaotong University 4 , Chongqing 400074, China
Funding
Sichuan Science and Technology Program · China National Key R&D Plan
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